Search:

Possibly you would need to edit usb_desc.h too (there are various sections). It is where VID and PID are defined.
Its location depends on the Teensy and OS you are using; for Teensy 3.x under...

I use PCBWay too. Quite satisfied.

Hi and welcome.

Well, spaghetti jumpers directly connected to the Teensy board? Sounds a bit extreme.
I would suggest using at least a protoboard, so you can test everything with a breadboard and...

Thank you very much Vindar!

OLEDs wear out, quite fast if you keep them at high intensity and with semi-fixed content.

Hello Vindar,
I'm using your nice ILI9341_T4 library on T4.1 with a 2.8" ILI9341 + XPT2046 touch.

I'm now looking for a simple 2D canvas lib (I need a few buttons and a couple of textboxes for my...

No issue, provided the two "3.3v" levels are within Teensy tolerance (i.e.: A=3.2V and B=3.4V are OK).
The (digital) GNDs have to be common.

@vindar: I cannot thank you enough!!

Following your instructions, I managed to have the "lvgl_music_demo" up&running on my T4.1. :D

I got 145fps at about 84% CPU load with refresh=5 and SPI at...

A few OSes have already been ported to the Teensy 4.1.

They are realtime OSes, not your typical shell-based or window-based OS, but still.

Just to name a few (please note I *did not* try any of...

Update: I purchased a new 2.8" display (the non-working one was 2.4") and this one works perfectly, touch included.

So I have a faulty 2.4" display, or maybe one that, despite being advertised as...

All my RPIs (from 0 to 4B) work without issues at 115200 via UART (pins 8 and 10 + GND).
So I would say it's not strictly a RPI_UART-related problem.

I may have a faulty touchscreen then. :(

I moved the touch_cs pin to 5 and changed the code, as per your suggestion, to:



#include <ILI9341_t3.h>
#include <font_Arial.h> // from ILI9341_t3
#include <XPT2046_Touchscreen.h>
#include...

I am not using the Audio Board. Just Teensy 4.1 + display.

I have the same issue.

My setup is described here https://forum.pjrc.com/threads/71367-T4-1-ILI9431_t3-(2-4-quot-display)-inverted-colors , it's the same as in PJRC page:...

SOLVED:
Had to add

tft.invertDisplay(false);

which is so very strange!
I mean: if I do not add the instruction at all, I get inverted colors.
If I add the instruction with "true" as...

I feel your pain!
Used LVGL for a RaspberryPi project, with framebuffer touchscreen (no X)... even just have everything properly configured has been a pain.
Then there's the question of the...

Anyway, clock speed does not tell the whole story: 4.x are faster than 3.x even at the same clock speed (arch improvements). So you may actually "downclock 4x more" and get the same speed when...

Something like this maybe?

27444

By the way: does it work with Teensy 4.1 as well? Maybe a silly question, but... just to be sure. :)

Thank you, that's great!

Hello,
was wondering, what is the current status of USBHost_t36 vs. reading mass storage devices?
In particular, I would like to read a "raw" SD card inserted into a USB card reader (which I would...

Happy birthday Paul!!

Impressive work, Rolf!!

Lots of nice suggestions, thank you!

Sorry, I was not clear.
I was not searching another algorithm to read encoders, I've tried them all.
I was looking for hint to port Luni's library specifically, from Teensy-only to other boards.

Yes, it's for the (only) USB Host port of the Teensy 3.6.



Sure, it's the standard USB Host T3.6 library which comes with Teensyduino:

https://github.com/PaulStoffregen/USBHost_t36

By the way.
I'm using the great EncoderTool library by luni:
https://github.com/luni64/EncoderTool

It's absolutely, by far, the best I've ever tried. Much better than Paul's library, which is...

It depends on what you're driving. For CEM 3394, for example, you just need 100nF caps.

GTK2 dev package is still available on Ubuntu 20 (libgtk2.0-dev).
Not sure if it helps.

Interesting library, thanks!

If you declare a global variable like


USBHost gUSBHostPort; // g prefix for "global"
USBHub gUSBHostHub(gUSBHostPort);
MIDIDevice gInputMIDIUSBDevice(gUSBHostPort);


then in main loop you...

Large soundfonts/samples are not exactly easy to manage with a microcontroller, even as powerful as the Teensy.
The 4.1 has a very fast integrate microSD slot and quite some RAM for buffering;...

Thank you Michael!

A bit expensive in EU (Eur 85 + shipping), will ask about overseas shipping (worried about shipping time and customs).

Yes, sorry, I have the bad habit of using the term in a generic way, for both multiplexing and demultiplexing.
If you demultiplex each DAC to say 16 channels (example: CD74HC4067, quite cheap), with...

Depending on the needed accuracy and speed... what about T3.5/3.6 integrated DACs?

T3.5s and 3.6s have two onboard 12-bit, independent DACs (pins A21 and A22). You could multiplex them (cheap...

Hi,

until now, I used the well known small OLED and TFT displays, up to 2.8", without issues.

Now I need something much larger: say 4.3" as very minimum, 7" if possible.
Resolution is not...

I use VisualStudio 2017 + VisualMicro for most of my work (minus TI and Microchip stuff). I like it a lot!
I fire up the Arduino IDE only for very simple stuff and trying example sketches on the fly.

I've read those data and they are not really telling much, apart from the very high sleep power consumption (1400 uA @ 5V).
Well I guess someone will post real world figures in a few weeks.

Does anybody has clear figures of actual power consumption, for the Pico?
I know, I seem to be the only one around here who cares a lot about power consumption ;) , but for me that's very important...

Pin number 13 is already "tied" to the onboard LED of Teensy 3.2. So it will always engage the onboard LED.
That said, you can still add another (external) LED to pin 13.
LEDs need series resistors...

Sure!
Read here:

https://www.pjrc.com/teensy/td_libs_Bounce.html

let us know if you need more support.

Just a quick note: your "delay(3)" works for 115200 data speed; but it's not going to work for different speeds.

With my HC-05 (v2 and I only use it as slave, so cannot help with INQ) I have to...

Assuming you're using Arduino IDE 1.8.12 with Teensyduino 1.52 installed, you could use the example:

"Examples->04.Communication->Serial.passthrough"

as a base, replacing "Serial1" with...

I don't know what Paul thinks about it, but I have to say I prefer 3.x to 4.x unfortunately.
4.x has too much power draw for most of my projects, even at lower clock speeds, and the powersave/sleep...

Paul asked to wait until final Teensyduino 1.53 is out: he does not want to discuss future models until then.

I have enabled 8 Mhz and 2 MHz in boards.txt and tried a few sketches on the LC.

Powered at 3.3v by Vin with Vin-Vusb cut:

Run @ 48 MHz = 11.8 mA
Run @ 24 MHz = 9.3 mA
Run @ 8 MHz = 4.3 mA...

You don't tell which development environment you are using.

If it's Arduino IDE + Teensyduino, you are already using the FPU automatically, no need to take extra steps. The compiler already...

You mean the setup runs fine and finds the board ("BNO found"), but the main loop never prints anything (so myIMU.dataAvailable() returns false)?

Yes, this is very unfortunate.
I have a lot of code, developed for T3.6, which uses "regular" SdFat with SdFatSdioEX objects.
Now I can't use it with T4.1, because SdFat Beta does not provide...